4
3		7			2
	7		1		8
							2
7
		1		2		4
		6			3		8
		2

Difficulty: Medium (0)

			8	4		2
					8
				7
5			4			3	8
6	3			1			4
			2
		7
	4		5	3

Difficulty: Very easy (0)

				1			8
	4		8			2
							2
				5	7		1
7		4	1
8
	7			4		6
4			2

Difficulty: Super easy (0)

	1				6
			6
	7		3	5
	2				1
		6				5
			5	4		2
				1
		3				7

Difficulty: Medium (0)